CN105547715B - Method for testing wheel force transfer function in whole vehicle state - Google Patents
Method for testing wheel force transfer function in whole vehicle state Download PDFInfo
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- CN105547715B CN105547715B CN201610049712.1A CN201610049712A CN105547715B CN 105547715 B CN105547715 B CN 105547715B CN 201610049712 A CN201610049712 A CN 201610049712A CN 105547715 B CN105547715 B CN 105547715B
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- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 238000012546 transfer Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title abstract description 5
- 230000004044 response Effects 0.000 claims abstract description 16
- 230000005284 excitation Effects 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 41
- 230000001133 acceleration Effects 0.000 claims description 16
- 238000005086 pumping Methods 0.000 claims description 15
- 238000010998 test method Methods 0.000 claims description 13
- 238000002474 experimental method Methods 0.000 claims description 4
- 230000006870 function Effects 0.000 description 50
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/013—Wheels
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention provides a method for testing a wheel force transfer function in a finished automobile state, which comprises the following steps: mounting test equipment; arranging a wheel center accelerometer and a tire top accelerometer; connecting a test system; calculating a transfer function of the wheel center accelerometer signal to the force hammer excitation signal; transfer function of tyre top accelerometer signal to force hammer excitation signal; a wheel force transfer function is calculated. The invention can obtain the response of the exciting force in three directions at the wheel center position of the wheel at one time; the aim of obtaining the tire skin vibration response by exciting the wheel center of the wheel is achieved as much as possible, and the actual stress mode of the wheel is simulated more truly; the whole test is more convenient and is close to the actual test.
Description
Technical field
The invention belongs to auto NVH experimental technique fields, more particularly, to vehicle wheel forces transmission function under a kind of whole vehicle state
Test method and device.
Background technology
With the increase of China's auto output and car ownership, China's automotive regulation proposes more vehicle safety performance
Strict requirements, while customer increasingly pays close attention to the quality of automobile, NVH (N-noise, V-vibration, H-
Harshness) noise and vibration comfort, which is increasingly becoming, determines the most important index of automotive quality sense.In order to exactly define and retouch
Vehicle NVH performances are stated, auto NVH experimental technique is come into being.
The most important function of wheel system is to transmit the power acted between road surface and suspension, and mitigate vehicle traveling process
In from road roughness generate impact vibration, decaying thus caused by vibration, to ensure ride of vehicle and vehicle
Interior NVH performances.
Vehicle wheel forces transmission function test method under whole vehicle state, it is contemplated that preloading effect of the vehicle body to wheel, and it is outstanding
Stabilization and supporting role of the frame system to wheel influence interior NVH research road excitation more have directive significance.
There are two problems during existing test vehicle wheel forces transmission function：First, the nearly core wheel of wheel can not be directly acquired
Vibrating numerical at position, second is that power hammer can not be at the nearly core wheel position of direct excited vibration wheel.
Invention content
In view of this, the present invention is directed to propose vehicle wheel forces transmission function test method and device under a kind of whole vehicle state, with
Realize that triggering once can be obtained vibration acceleration and tire top vibration acceleration numerical value at nearly core wheel position, to obtain vehicle wheel forces
Transmission function.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
Vehicle wheel forces transmission function test method under a kind of whole vehicle state, includes the following steps：
(1) test equipment is installed：Experiment vehicle is parked on smooth horizontal plane, vehicle wheel forces are installed in the wheel hub of wheel
Function test device, vehicle wheel forces transmission function test device include the disk coaxial with core wheel and are mounted on circle disk center position
Boss, the arranging wheel heart acceleration meter on the top surface of boss, in tire summit tire top accelerometer, by core wheel accelerometer and
Tire top accelerometer is connected to the input terminal of data collector by connecting line, while power trigger device is connected to data acquisition
The output end of the input terminal of device, data collector is connected to computer by connecting line；
(2) transfer function H of the core wheel accelerometer signal to power trigger device pumping signal is calculatedX10/HY10/HZ10And
Transfer function H of the tire top accelerometer signal to power trigger device pumping signalX20/HY20/HZ20：
Firmly trigger device hammers top surface, lower edge and the right side of boss respectively, obtains the power triggering dress in three directions
Pumping signal is set, while recording the power trigger device pumping signal H in three directions using data collectorX0/HY0/HZ0, and wheel
Response signal H of the heart acceleration meter in three directionsX1/HY1/HZ1And tire summit accelerometer is in the response in three directions
Signal HX2/HY2/HZ2, indicate core wheel point to power with the ratio of core wheel accelerometer response signal and power trigger device pumping signal
The transfer function H of trigger device pumping signalX10/HY10/HZ10, encouraged with tire top accelerometer response signal and power trigger device
The ratio of signal indicates transfer function H of the tire top accelerometer signal to power hammer excitation signalX20/HY20/HZ20；
(3) wheel disk is calculated according to the following formula to the power transmission function of tire summit tyre surface, i.e. vehicle wheel forces transmit letter
Number：
Further, core wheel accelerometer is mounted on the circle centre position of boss, and core wheel accelerometer in the step (1)
Geometric center it is coaxial with the center of circle of disk, tire top accelerometer is located at wheel tire top and periderm tangency location.
Compared with the existing technology, under a kind of whole vehicle state of the present invention vehicle wheel forces transmission function test method have it is following
Advantage：
(1) vehicle wheel forces transmission function test device makes capable trigger position with core wheel accelerometer as close to land wheel
The heart, it is only necessary to arrange 2 vibration acceleration meters, power hammer, which only needs to act on 1 time, can be obtained core wheel acceleration responsive, tire top acceleration
Response, to obtain vehicle wheel forces transmission function；
(2) consider that the otherness of hub for vehicle wheel planform, this method may insure that each energized position is vehicle wheel
The consistency of axis and energized position accelerometer position where the heart；
(3) a set of power transmission function test device being connect with wheel is devised, which mainly solves wheel vibration isolation
Two critical issues of test, one can disposably obtain the excitation of three directions at wheel disk position force-responsive；Its
Two, it realizes obtain the purpose of periderm vibratory response by encouraging wheel disk as much as possible, more truly simulate vehicle
Take turns actual force way；So that entirely testing more convenient, close practical；
(4) to be more nearly wheel practical by load condition for vehicle wheel forces transmission function test method under whole vehicle state, for
Property is stronger.
Another object of the present invention is to propose vehicle wheel forces transmission function test device under a kind of whole vehicle state, touched with realizing
Hair once can be obtained vibration acceleration and tire top vibration acceleration numerical value at nearly core wheel position, and letter is transmitted to obtain vehicle wheel forces
Number.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
Vehicle wheel forces transmission function test device under a kind of whole vehicle state, including test vehicle, it is mounted on test vehicle wheel
The vehicle wheel forces transmission function test device of wheel hub, the core wheel accelerometer in vehicle wheel forces transmission function test device,
Tire top accelerometer, power trigger device, data collector at wheel tire top and computer；The vehicle wheel forces are transmitted
Function test device includes disk and the boss at circle disk center, and the boss center of circle is coaxial with circle disk center；The wheel
Heart acceleration meter, tire top accelerometer are connected to the input terminal of data collector by connecting line；The power trigger device connection
To the input terminal of data collector；The output end of the data collector connects the computer.
Further, the disk is assembled together by interior hexagonal fastening bolt and wheel hub, is additionally provided on the disk micro-
Connecting hole is adjusted, for finely tuning disk.
Further, the core wheel accelerometer is mounted on the circle centre position of boss, and in the geometry of core wheel accelerometer
The heart is coaxial with the center of circle of disk, and tire top accelerometer is located at wheel tire top and periderm tangency location.
Further, the core wheel accelerometer is 3-axis acceleration sensor.
Further, the tire top accelerometer is 3-axis acceleration sensor.
Further, the core wheel accelerometer is bonding by adhesive glue and the boss.
Further, the tire top accelerometer is bonding by adhesive glue and the boss.
Further, the power trigger device is hammered into shape for power.
Vehicle wheel forces transmission function test device is passed with vehicle wheel forces under a kind of above-mentioned whole vehicle state under a kind of whole vehicle state
Possessed advantage is identical compared with the existing technology for delivery function test method, and details are not described herein.
Description of the drawings
The attached drawing for constituting the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is vehicle wheel forces transmission function device to test figure under a kind of whole vehicle state described in the embodiment of the present invention；
Fig. 2 is the front view of the vehicle wheel forces transmission function test device described in the embodiment of the present invention；
Fig. 3 is the side view of the vehicle wheel forces transmission function test device described in the embodiment of the present invention；
Fig. 4 is the assembling front view of the vehicle wheel forces transmission function test device described in the embodiment of the present invention；
Fig. 5 is the assembling side elevation of the vehicle wheel forces transmission function test device described in the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the connector described in the embodiment of the present invention.
Reference sign：
1- wheel force function test devices；2- core wheel accelerometers；3- tire top accelerometers；4- power is hammered into shape；5- data acquire
Device；6- computers；10- disk bodies；11- connectors；12- fastening nuts；101- disks；102- boss；103- connecting holes.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To express or implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Vehicle wheel forces transmission function test chart, test method include the following steps under a kind of whole vehicle state as shown in Figure 1：
(1) positions of wheels of vehicle is adjusted
Test vehicle is moved to the laboratory of Land leveling, ensures that plane where two axle of front and back wheel is parallel to as possible
Ground keeps vehicle wheel to be measured (rear left wheel) state consistent with practical pavement state.
(2) installation vehicle wheel forces transmission function test device 1
Vehicle wheel forces transmission function test device 1 is as shown in Figure 2,3, and vehicle wheel forces transmission function test device 1 includes disk body
10, connector 11 and fastening nut 12, disk body include disk 101, boss 102 and connecting hole 103,102 center of circle of boss with
101 center of circle of disk is coaxial, and connector 11 is as shown in Figure 5；
Vehicle wheel forces transmission function 1 installation diagram of test device is as shown in Figure 3,4, using vehicle self-carrying hoisting apparatus by vehicle body branch
It rises, rear left wheel is made to be detached from ground, terrain clearance about 5cm.After 5 fastening bolt releases of wheel are taken down, by 5 connectors 11
It is carried with brake disc by connecting hole 103 and is bolted and fastens, later load onto disk body 10 according to 103 position of connecting hole, led to
The connection relation crossed between 11 connection screw thread of fastening nut 12 and connector fits closely disk body 10 and hub for vehicle wheel together,
Vehicle wheel forces transmission function test device 1 is allow to be activated that power is transmitted to wheel itself by carrier disk body 10.Vehicle wheel forces
After transmission function test device 1 is installed, rear left wheel is slowly put down, it is made to touch ground, removes hoisting apparatus.
(3) arrangement core wheel and tire top accelerometer
It arranges wheel disk accelerometer 2, core wheel accelerometer 2 is passed through into the boss 102 of adhesives to disk body 10
In plane, core wheel accelerometer 2 is 3-axis acceleration flowmeter sensor, and core wheel accelerometer 2 is arranged in the centre bit of boss 102
It sets so that the X of core wheel accelerometer 2 is parallel to ground, towards headstock direction to rear left wheel core wheel is passed through；Take turns heart acceleration
The Y-direction of meter 2 is directed toward rear right wheel direction along two rear wheel core wheel direction of test vehicle, direction；The Z-direction of core wheel accelerometer 2
Perpendicular to ground, direction is straight up；
Arrange tire top accelerometer 3, by tire top accelerometer 3 by adhesives to tire tire top position, tire top adds
Speedometer 3 is 3-axis acceleration sensor, and tire top accelerometer 3 is arranged in tire top surface so that the X of tire top accelerometer 3
It is identical to parallel, being directed toward with core wheel accelerometer X, and tire top accelerometer 3 and tire top are tangent；The Y-direction of tire top accelerometer 3
Parallel with the Y-direction of core wheel accelerometer 2, direction is identical, and face center line is indulged in 3 center of tire top accelerometer by tire；
The Z-direction of tire top accelerometer 3 is parallel with the Z-direction of core wheel accelerometer 2, and direction is identical, and Z-direction and periderm are tangent.
(4) connecting test system
Core wheel accelerometer 3 and tire top accelerometer 2 are connected to data collector 5 respectively, while power hammer 4 being connected to
Data collector 5, data collector 5 by connecting line connect computer 6, data collector 5 have central processing unit (CPU),
Read-only memory (ROM), readable and writable memory (RAM), screen display, keyboard and computer interface pass through interface and calculating
Machine 6 connects.
(5) transfer function H of the core wheel point to power hammer excitation signal is calculatedX10/HY10/HZ10And tire top accelerometer signal
To the transfer function H of power hammer excitation signalX20/HY20/HZ20：
Firmly hammer 4 hammers tri- directions X/Y/Z of boss 102 respectively, and tri- directions X/Y/Z of boss 102 add with core wheel
Tri- directions X/Y/Z of speedometer 2 are consistent, obtain power hammer excitation signal, while recording 4 excitation of power hammer using data collector 5
Signal HX0/HY0/HZ0And the response signal H of core wheel accelerometerX1/HY1/HZ1And the H of tire top accelerometer signalX2/
HY2/HZ2, the pumping signal that core wheel point hammers power into shape is indicated with the ratio of the response signal of core wheel accelerometer and power hammer excitation signal
Transfer function HX10/HY10/HZ10, tire top is indicated with the ratio of the response signal of tire top accelerometer and the pumping signal of power hammer
The transfer function H for the pumping signal that the response signal of accelerometer hammers power into shapeX20/HY20/HZ20；
(6) wheel disk is calculated according to the following formula to the power transmission function of tire summit table top, i.e. vehicle wheel forces transmit letter
Number：
An embodiment of the present invention provides vehicle wheel forces transmission function test methods under a kind of whole vehicle state, with other tire wheels
Power transmission function test method compares, and this patent designs a set of vehicle wheel forces transmission function test for the test of wheel transmissibility
Device simplifies vehicle wheel forces transmission function test process using the device, it is only necessary to which power hammer taps primary, you can obtains vehicle wheel forces and passes
Delivery function；Ensure that test every time obtains the stability of level of vibration at wheel disk position simultaneously；In addition, vehicle wheel forces transmit letter
Number test devices make the exciting in tri- directions X/Y/Z more convenient with it is accurate.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (2)
1. vehicle wheel forces transmission function test method under a kind of whole vehicle state, it is characterised in that：Include the following steps：
(1) test equipment is installed：Experiment vehicle is parked on smooth horizontal plane, wheel force function is installed in the wheel hub of wheel
Test device, vehicle wheel forces transmission function test device include the disk coaxial with core wheel and mounted on the convex of circle disk center position
Platform, the arranging wheel heart acceleration meter on the top surface of boss, in tire summit tire top accelerometer, by core wheel accelerometer and tire top
Accelerometer is connected to the input terminal of data collector by connecting line, while power trigger device is connected to data collector
The output end of input terminal, data collector is connected to computer by connecting line；
(2) transfer function H of the core wheel accelerometer signal to power trigger device pumping signal is calculatedX10/HY10/HZ10And tire top
Transfer function H of the accelerometer signal to power trigger device pumping signalX20/HY20/HZ20：
Firmly trigger device hammers top surface, lower edge and the right side of boss respectively, and the power trigger device for obtaining three directions swashs
Signal is encouraged, while recording the power trigger device pumping signal H in three directions using data collectorX0/HY0/HZ0And core wheel adds
Response signal H of the speedometer in three directionsX1/HY1/HZ1And tire summit accelerometer is in the response signal in three directions
HX2/HY2/HZ2, indicate that core wheel point triggers power with the ratio of core wheel accelerometer response signal and power trigger device pumping signal
The transfer function H of device pumping signalX10/HY10/HZ10, with tire top accelerometer response signal and power trigger device pumping signal
Ratio indicate tire top accelerometer signal to the transfer function H of power hammer excitation signalX20/HY20/HZ20；
(3) wheel disk is calculated according to the following formula to the power transmission function of tire summit tyre surface, i.e. vehicle wheel forces transmission function：
2. vehicle wheel forces transmission function test method under a kind of whole vehicle state according to claim 1, it is characterised in that：It is described
Core wheel accelerometer is mounted on the circle centre position of boss, and the circle of the geometric center of core wheel accelerometer and disk in step (1)
The heart is coaxial, and tire top accelerometer is located at wheel tire top and periderm tangency location.
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| CN201610049712.1A CN105547715B (en) | 2016-01-25 | 2016-01-25 | Method for testing wheel force transfer function in whole vehicle state |
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| CN105547715B true CN105547715B (en) | 2018-09-25 |
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| CN110879872B (en) * | 2019-11-15 | 2021-09-17 | 中国科学院长春光学精密机械与物理研究所 | Vehicle system transfer function solving method based on transfer matrix |
| CN112033704B (en) * | 2020-08-12 | 2022-03-11 | 重庆长安汽车股份有限公司 | Method for testing vibration isolation performance of wheel |
| CN113418589B (en) * | 2021-06-17 | 2023-08-11 | 郑州日产汽车有限公司 | Wheel core excitation testing device in whole vehicle state |
| CN113390653A (en) * | 2021-07-15 | 2021-09-14 | 东风汽车集团股份有限公司 | Wheel force transfer rate testing method and system |
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